The L2TP packet processing functionality in Juniper Netscreen and ScreenOS Firewall products with ScreenOS before 6.3.0r13-dnd1, 6.3.0r14 through 6.3.0r18 before 6.3.0r18-dnc1, and 6.3.0r19 allows remote attackers to cause a denial of service via a crafted L2TP packet.

Software release Service Packages are available at http://support.juniper.net from the "Download Software" links. Select your appropriate Selected Products, or browse by Series or Technology, once you find the appropriate fixed version(s) for your needed platform download and apply the updated version(s) of choice